11000011221 has 32 divisors (see below), whose sum is σ = 17209420800. Its totient is φ = 6924936240.

The previous prime is 11000011219. The next prime is 11000011249. The reversal of 11000011221 is 12211000011.

It is a happy number.

It is not a de Polignac number, because 11000011221 - 2¹ = 11000011219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000011021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125070 + ... + 194016.

It is an arithmetic number, because the mean of its divisors is an integer number (537794400).

Almost surely, 2^11000011221 is an apocalyptic number.

It is an amenable number.

11000011221 is a deficient number, since it is larger than the sum of its proper divisors (6209409579).

11000011221 is a wasteful number, since it uses less digits than its factorization.

11000011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69286 (or 69280 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11000011221 its reverse (12211000011), we get a palindrome (23211011232).

The spelling of 11000011221 in words is "eleven billion, eleven thousand, two hundred twenty-one".